So these still have the separate Z-motors... I remember that was a PITA to keep level when Z motor current is tuned off. I designed a single Z motor mod: https://www.thingiverse.com/thing:3612257, but there are others available, I've seen one where the motor is located on the side which might be a better solution. Also for maybe more rigid bed support: https://www.thingiverse.com/thing:3630372, not sure if this works with the bigger printer, mine is X5S which is 330x330.